Student or Learner
What word does not belong in each of the 4 words and why ?
1) produced, traded, changed, replaced
2) manufactures, purchases, buys, shops for
It looks like homework to me.
No, no homework.
Could it be that my question is a bridge too far ?
Just kidding, of course...
When you have a question like this, check the words in a dictionary. Then you should know which word doesn't fit with the others.